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Model S2

Model S2
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Model S2

Product catalog summary
Basic Information
The document provides technical specifications for the Model S2 self-operated pressure reducing valve by diaphragm. It operates by closing when outlet pressure increases and is suitable for liquids, compressed air, neutral gases, and steam. The valve has a Kv range of 3.5 to 115 m3/h·bar and a Cv range of 4.0 to 135 gpm·psi. It can handle temperatures from -10 to 180 ºC (14 to 356 ºF) and is available in sizes DN15 to DN100 (1/2” to 4”). The valve can be connected via flanged (DIN - ANSI) or threaded (BSP - NPT) ends, with a maximum inlet pressure of 40 barg up to DN50 and 25 barg up to DN100.
Parts and Materials
The valve consists of various parts made from materials such as ductile iron, bronze, carbon steel, and stainless steel. Key components include the body, seat, stem, bushing guide, screw, gasket, nut, O-ring, support spring, upper and lower actuators, diaphragm, and seals. Each part is specified with ANSI/ASTM and DIN/EN standards for material composition.
Standard Configurations
The document outlines standard configurations for different valve sizes, including Kv and Cv values, dimensions, and weights. It also specifies actuator diameters required for different outlet pressure ranges.
Main Design Standards
The valve design adheres to several standards, including EN 558-1, EN 1092-1, ISA 75.03, ASME B16.5, EN 10226-1, ANSI/ASME B1.20.1, EN 12516-1, EN 60534-2-3, and EN 12266-1, covering aspects like face-to-face dimensions, flange specifications, thread requirements, shell design strength, flow capacity, and pressure tests.
Operation
The S2 model operates on a direct action principle, with a balancing gasket eliminating forces at the plug caused by upstream and downstream pressures. The valve opens proportionally to changes in pressure when the upstream pressure force exceeds the spring force set at the set point bolt.
Standard Installations
The document provides a schematic for standard installations, including components like check valves, filters, pressure gauges, reducing valves, safety valves, and tanks. It also includes a disclaimer noting that specifications and technical data are subject to change without notice.
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Catalog excerpts

Model S2-1

PARTS Pressure Reducing Valve - Model S2 Self-operated pressure reducing valve by diaphragm Valve closes when outlet pressure increases S2 Flanged (DIN - ANSI) or Threaded (BSP - NPT) RF - RF, NPT, BSP PN25 - PN40 (150# - 300#) DN15 to DN100 [mm] (1/2” to 4”) Liquids, compressed air, neutral gases and steam Kv Cv Temperature Inlet max. pressure Outlet pressure 40 [barg] up to DN50 (2") 25 [barg] up to DN100 (4") 0,1 - 16 [barg] GALILEO 8, POL. IND. CAN ESTELLA 08635 REV. 01 / 14 ST ESTEVE SESROVIRES, BARCELONA, SPAIN WWW.efSVaIVeS.c°m This information is subjected to changes

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Model S2-2

Model S2 - Pressure Reducing Valve by diaphragm REF. Recommended spare parts GALILEO 8, POL. IND. CAN ESTELLA 08635 REV. 01/ 14 ST ESTEVE SESROVIRES, BARCELONA, SPAIN www-efsvalves-c°m This information is subjected to changes

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Model S2-3

Model S2 - Pressure Reducing Valve by diaphragm o available on request IMPORTANT NOTE: Kv or CV reduced is available ACTUATOR DIAMETER ACCORDING TO REQUIRED OUTLET PRESSURE: D [mm] Outlet Range [barg] GALILEO 8, POL. IND. CAN ESTELLA 08635 REV. 01/ 14 ST ESTEVE SESROVIRES, BARCELONA, SPAIN www.efsvalves.com This information is subjected to changes

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Model S2-4

Model S2 - Pressure Reducing Valve by diaphragm MAIN DESIGN STANDARDS STANDARD DESCRIPTION EN 558-1 Face-to-face dimensions flanges drilled acc. to EN 1092-1 EN 1092-1,2 Flanges and their joints ISA 75.03 Face-to-face dimensions flanges drilled acc. to ASME B16.5 or EN 558-2 ASME B16.5 Flanges and Flanged Ratings for Class 150, 300, etc. ANSI/ASME B1.20.1 National Pipe Thread Taper EN 12516-1 Shell design strength - Tabulation method for steel valve shells EN 60534-2-3 Industrial control valves - Flow capacity - Test procedure EN 12266-1 Pressure tests, test procedures...

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Model S2-5

Model S2 - Pressure Reducing Valve by diaphragm Disclaimer The information, specifications and technical data contained in this catalogue are subject to change without notice by the manufacturer. The user should verify all technical data and specifications prior to use. EFSVALVES does not warrant that the material and information contained herein is current or correct and assumes no responsibility for the use or misuse of any such material and information by the users. GALILEO 8, POL. IND. CAN ESTELLA 08635 REV. 01/ 14 ST ESTEVE SESROVIRES, BARCELONA, SPAIN www.efSVa1 2 3 4 5 6 7VeS.c°m This...

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